private void btnZaloguj_Click(object sender, EventArgs e) { SaticClass.statusWejscia = false; //check if eligible to be logged in if (login.IsLoggedIn(user, pass)) { lblLoginValidate.Text = login.userMessage; lblPassValidate.Text = login.passMessage; SaticClass.statusWejscia = true; this.Close(); } else { //show default login error message lblLoginValidate.Text = login.userMessage; lblPassValidate.Text = login.passMessage; } }